Sifu Roy cultivating natures energies at sunrise.
An excerpt from the T'ai Chi Classic (Taiji Jing) attributed to legendary founder Zhang Sanfung circa 12-14th century:
"In motion the whole body should be light and agile, with all parts of the body linked as if threaded together (like a string of pearls)."
A major skill cultivated through proper practice is consistency in stability while the whole body is in motion. Zhong Ding is maintained in the Centerline, regardless of being on one foot, the other foot, or transitioning between them. Steps become "empty" causing them to be light and agile. The key phrases are, "Walk like the cat, Step on the ice, and Do not drag your foot in the mud."
Coordination aka body connection is another important skill where the lower body works with the upper body and the internal and external aspects of mind and body harmonize into one Yi. This refined clarity of Yi leads the Qi, as it threads throughout the whole body, creating a cohesive physical and cerebral unity.
The Classics provides modern practitioners an authentic link to the past. They are far from a complete explanation but serve more as a textbook for students.